Frequency-tuning characteristics of cervical and ocular vestibular evoked myogenic potentials induced by air-conducted tone bursts

Park, Hong Ju; Lee, In Sik; Shin, Jung Eun; Lee, Yeo Jin; Park, Mun Su

doi:10.1016/j.clinph.2009.10.003

Cited by 100 publications

(80 citation statements)

References 19 publications

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“…For the oVEMP, this was calculated as the peak-peak difference (in V) between the first negative (n10) and positive peak of the contralateral response waveform. Both peak-peak and baseline-peak measures of oVEMP amplitudes are reported in the literature [Rosengren et al, 2008;Todd et al, 2009;Lewis et al, 2010, Park et al, 2010 and have been shown to be strongly correlated [Welgampola et al, 2009]. We chose to analyse the peakpeak amplitudes to avoid inaccuracies in baseline identification from background noise, which can be a problem for low-amplitude responses.…”

Section: Stimulimentioning

confidence: 99%

Tuning Characteristics of Ocular and Cervical Vestibular Evoked Myogenic Potentials in Intact and Dehiscent Ears

Taylor¹,

Bradshaw²,

Halmagyi³

et al. 2012

Audiol Neurotol

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Cervical and ocular vestibular evoked myogenic potentials (cVEMPs and oVEMPs) to air-conducted tone bursts (250–2000 Hz) were recorded in 14 patients with superior canal dehiscence (SCD) and 32 healthy controls. For cVEMPs, the most common ‘optimal frequency’ in control ears (48.2%) was 500 Hz; for oVEMPs, it was 1000 Hz (51.8%). We found a significant interaction between age and frequency, with a shift towards higher-frequency tuning in older subjects. cVEMP and oVEMP tuning in SCD was characterised by a broadening of amplitude and threshold tuning curves. The tendency of cVEMPs to tune to lower frequencies compared to oVEMP was enhanced in SCD. Differences in cVEMP and oVEMP ‘optimal frequencies’, demonstrated in 57.1% intact ears and 81.3% dehiscent ears, imply differences in the recruitment of hair cells generating these two reflexes. Age-matched oVEMP amplitudes provided excellent separation between SCD and control ears. Although cVEMP amplitudes overlapped between SCD and control ears, better separation was achieved by using a 2-kHz stimulus.

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Section: Stimulimentioning

confidence: 99%

Tuning Characteristics of Ocular and Cervical Vestibular Evoked Myogenic Potentials in Intact and Dehiscent Ears

Taylor¹,

Bradshaw²,

Halmagyi³

et al. 2012

Audiol Neurotol

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“…For TBVs, the frequency tuning effect of the saccule leads to the lowest thresholds obtained in response to 500-Hz stimuli (Park et al, 2010;Tourtillott et al, 2010). This is also the stimulus frequency used in the meta-analysis and a weighted mean of 81.02 dB nHL (SD 2.03) with a range of 80.76-81.29 is suggested as normal.…”

Section: Discussionmentioning

confidence: 99%

“…There is a general agreement across click and tone burst evoked studies that an increase in intensity will lead to a corresponding increase in response amplitude, under the condition of an equal SCM muscle contraction level throughout all recordings (Wit & Kingma, 2006;Welgampola & Colebatch, 2001a;Colebatch et al, 1994). Stimulus frequency also has a definite effect on cVEMP response amplitude and the saccule exhibits maximum resonance at lower frequencies (Todd et al, 2000;Park et al, 2010). A linear relationship between stimulus duration and cVEMP amplitude is expected where an increase in tone burst plateau and rise and fall time, as well as overall click duration will lead to an increase in response amplitude (Welgampola & Colebatch, 2001a;Cheng & Morufushi, 2001b.…”

Section: Vestibular Function Testing Commonly Consists Of a Battery Omentioning

confidence: 99%

cVEMPs: A systematic review and meta-analysis

Vinck

Heinze

2014

International Journal of Audiology

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Objective: A systematic literature review and meta-analysis was performed to determine the effect of stimulus type, SCM muscle activation method, transducer type, and method to control SCM muscle EMG level on response parameter values for 0.1-ms click-evoked and 500-Hz tone burst cVEMPs. A description of normative response values was attempted. Design: An electronic systematic literature review was performed to obtain normative cVEMP response data. Subsequently a meta-analysis was conducted to determine significant effects on cVEMP response parameters and to obtain norms. Study sample: Scopus was used to identify reports containing normative data. Reports were selected based on inclusion and exclusion criteria determined beforehand. Weighted means were calculated and compared to identify significant effects and normative data. Results: Sixty-six reports were included in the systematic review. Stimulus type, SCM muscle activation method, transducer type, and method to control SCM muscle EMG level had significant effects on all response parameters. Conclusions: Optimal stimulus and recording parameters suggested by previous research are confirmed by the current systematic review and meta-analysis and are suggested for clinical use. Response parameter values are influenced by variations in stimulus and recording parameters and normative response values are suggested as guideline for cVEMP interpretation.

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“…Compared to normal subjects, who have highest AC oVEMP amplitudes and lowest thresholds in response to tone bursts around 500 Hz [41,79], in MD patients the optimal stimulus frequency is shifted upwards to 1000 Hz [80,79,81]. At 500Hz, the oVEMP response rates are lower, amplitudes smaller, and thresholds higher than in subjects without MD [81,80].…”

Section: Menière's Diseasementioning

confidence: 99%

“…Normal oVEMPs and cVEMPs have tuning curves with optimal responses between about 400 and 1000 Hz to AC and between 100 and 250 Hz to BC [36,[39][40][41]. In contrast, patients with SCD have much wider amplitude and threshold tuning curves [36, 42,38]: AC oVEMP curves tend to shift upwards, while AC cVEMP curves tend to shift downwards [36].…”

Section: Superior Canal Dehiscence (Scd)mentioning

confidence: 99%